<template>
  <div class="prism-player" :id="playerId" :style="playStyle"></div>
</template>

<script>
export default {
  name: "Aliplayer",
  props: {
    playStyle: {
      type: String,
      default: ""
    },
    aliplayerSdkPath: {
      // Aliplayer 代码的路径
      type: String,
      default: "//g.alicdn.com/de/prismplayer/2.1.0/aliplayer-min.js"
    },
    autoplay: {
      type: Boolean,
      default: false
    },
    isLive: {
      type: Boolean,
      default: false
    },
    playsinline: {
      type: Boolean,
      default: false
    },
    width: {
      type: String,
      default: "100%"
    },
    height: {
      type: String,
      default: "320px"
    },
    controlBarVisibility: {
      type: String,
      default: "always"
    },
    useH5Prism: {
      type: Boolean,
      default: false
    },
    useFlashPrism: {
      type: Boolean,
      default: false
    },
    vid: {
      type: String,
      default: ""
    },
    playauth: {
      type: String,
      default: ""
    },
    source: {
      type: String,
      default: ""
    },
    cover: {
      type: String,
      default: ""
    },
    format: {
      type: String,
      default: "m3u8"
    },
    x5_video_position: {
      type: String,
      default: "top"
    },
    x5_type: {
      type: String,
      default: "h5"
    },
    x5_fullscreen: {
      type: Boolean,
      default: false
    },
    x5_orientation: {
      type: Number,
      default: 2
    },
    autoPlayDelay: {
      type: Number,
      default: 0
    },
    autoPlayDelayDisplayText: {
      type: String
    }
  },
  data() {
    return {
      playerId: "aliplayer_" + Math.random() * 100000000000000000,
      scriptTagStatus: 0,
      instance: null
    };
  },
  created() {
    if (window.Aliplayer !== undefined) {
      // 如果全局对象存在，说明编辑器代码已经初始化完成，直接加载编辑器
      this.scriptTagStatus = 2;
      this.initAliplayer();
    } else {
      // 如果全局对象不存在，说明编辑器代码还没有加载完成，需要加载编辑器代码
      this.insertScriptTag();
    }
  },
  mounted() {
    if (window.Aliplayer !== undefined) {
      // 如果全局对象存在，说明编辑器代码已经初始化完成，直接加载编辑器
      this.scriptTagStatus = 2;
      this.initAliplayer();
    } else {
      // 如果全局对象不存在，说明编辑器代码还没有加载完成，需要加载编辑器代码
      this.insertScriptTag();
    }
  },
  methods: {
    insertScriptTag() {
      const _this = this;
      let playerScriptTag = document.getElementById("playerScriptTag");
      // 如果这个tag不存在，则生成相关代码tag以加载代码
      if (playerScriptTag === null) {
        playerScriptTag = document.createElement("script");
        playerScriptTag.type = "text/javascript";
        playerScriptTag.src = this.aliplayerSdkPath;
        playerScriptTag.id = "playerScriptTag";
        let s = document.getElementsByTagName("head")[0];
        s.appendChild(playerScriptTag);
      }
      if (playerScriptTag.loaded) {
        _this.scriptTagStatus++;
      } else {
        playerScriptTag.addEventListener("load", () => {
          _this.scriptTagStatus++;
          playerScriptTag.loaded = true;
          _this.initAliplayer();
        });
      }
      _this.initAliplayer();
    },
    initAliplayer() {
      const _this = this;
      // scriptTagStatus 为 2 的时候，说明两个必需引入的 js 文件都已经被引入，且加载完成
      if (_this.scriptTagStatus === 2 && _this.instance === null) {
        // Vue 异步执行 DOM 更新，这样一来代码执行到这里的时候可能 template 里面的 script 标签还没真正创建
        // 所以，我们只能在 nextTick 里面初始化 Aliplayer
        _this.$nextTick(() => {
          _this.instance = window.Aliplayer({
            id: _this.playerId,
            autoplay: _this.autoplay,
            isLive: _this.isLive,
            playsinline: _this.playsinline,
            format: _this.format,
            width: _this.width,
            height: _this.height,
            controlBarVisibility: _this.controlBarVisibility,
            useH5Prism: _this.useH5Prism,
            useFlashPrism: _this.useFlashPrism,
            vid: _this.vid,
            playauth: _this.playauth,
            source: _this.source,
            cover: _this.cover,
            x5_video_position: _this.x5_video_position,
            x5_type: _this.x5_type,
            x5_fullscreen: _this.x5_fullscreen,
            x5_orientation: _this.x5_orientation,
            autoPlayDelay: _this.autoPlayDelay,
            autoPlayDelayDisplayText: _this.autoPlayDelayDisplayText
          });

          // 绑定事件，当 AliPlayer 初始化完成后，将编辑器实例通过自定义的 ready 事件交出去
          _this.instance.on("ready", () => {
            this.$emit("ready", _this.instance);
          });

          _this.instance.on("play", () => {
            this.$emit("play", _this.instance);
          });

          _this.instance.on("pause", () => {
            this.$emit("pause", _this.instance);
          });

          _this.instance.on("ended", () => {
            this.$emit("ended", _this.instance);
          });

          _this.instance.on("liveStreamStop", () => {
            this.$emit("liveStreamStop", _this.instance);
          });

          _this.instance.on("m3u8Retry", () => {
            this.$emit("m3u8Retry", _this.instance);
          });

          _this.instance.on("hideBar", () => {
            this.$emit("hideBar", _this.instance);
          });

          _this.instance.on("waiting", () => {
            this.$emit("waiting", _this.instance);
          });

          _this.instance.on("snapshoted", () => {
            this.$emit("snapshoted", _this.instance);
          });
        });
      }
    },
    /**
     * 播放视频
     */
    play: function() {
      this.instance.play();
    },
    /** 
     * 暂停视频
     */
    pause: function() {
      this.instance.pause();
    },
    /**
     * 重播视频
     */
    replay: function() {
      this.instance.replay();
    },
    /**
     * 跳转到某个时刻进行播放
     * @argument time 的单位为秒
     */
    seek: function(time) {
      this.instance.seek(time);
    },
    /**
     * 获取当前时间 单位秒
     */
    getCurrentTime: function() {
      return this.instance.getCurrentTime();
    },
    /**
     *获取视频总时长，返回的单位为秒
     * @returns 返回的单位为秒
     */
    getDuration: function() {
      return this.instance.getDuration();
    },
    /**
      获取当前的音量，返回值为0-1的实数ios和部分android会失效
     */
    getVolume: function() {
      return this.instance.getVolume();
    },
    /**
      设置音量，vol为0-1的实数，ios和部分android会失效
     */
    setVolume: function(vol) {
      this.instance.setVolume(vol);
    },
    /**
     *直接播放视频url，time为可选值（单位秒）目前只支持同种格式（mp4/flv/m3u8）之间切换暂不支持直播rtmp流切换
     *@argument url 视频地址
     *@argument time 跳转到多少秒
     */
    loadByUrl: function(url, time) {
      this.instance.loadByUrl(url, time);
    },
    /**
     * 设置播放速度
     *@argument speed 速度
     */
    setSpeed: function(speed) {
      this.instance.setSpeed(speed);
    },
    /**
     * 设置播放器大小w,h可分别为400px像素或60%百分比chrome浏览器下flash播放器分别不能小于397x297
     *@argument w 播放器宽度
     *@argument h 播放器高度
     */
    setPlayerSize: function(w, h) {
      this.instance.setPlayerSize(w, h);
    },
    /**
     * 目前只支持HTML5界面上的重载功能,暂不支持直播rtmp流切换m3u8）之间切换,暂不支持直播rtmp流切换
     *@argument vid 视频id 
     *@argument playauth 播放凭证
     */
    reloaduserPlayInfoAndVidRequestMts: function(vid, playauth) {
      this.instance.reloaduserPlayInfoAndVidRequestMts(vid, playauth);
    }
  }
};
</script>

<style>
@import url(//g.alicdn.com/de/prismplayer/2.1.0/skins/default/aliplayer-min.css);
</style>